"Beyond Human Nature" is scheduled for release in 2020.(Photo: Courtesy of StoryFirst Media)

The 1992 murder of Green Bay paper mill worker Tom Monfils is the subject of a full-length documentary feature due out in 2020.

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Tom Monfils was found dead in the old James River Mill in Green Bay in 1992.(Photo: File/Press-Gazette Media)

“Beyond Human Nature” is scheduled to complete its last large-scale production shoot Wednesday through March 12 at nine locations in and around Madison, Middleton, Monroe and Waunakee. Director Michael Neelsen and his crew will be filming re-enactments to supplement the 13 interviews done to date for the film about one of the most high-profile murder cases in Green Bay history.

Monfils was 35 when he disappeared from his work station at the former James River Paper Mill. A few days later, searchers found his body in a paper pulp vat. A weight had been tied by a rope to his neck. Detectives and a medical examiner concluded Monfils had been beaten into unconsciousness.

Prosecutors convinced a jury that lead defendant Keith Kutska, angry that Monfils had reported him for a minor theft from the mill, whipped co-workers into a frenzy that resulted in them beating Monfils and throwing him into the vat.

Three years later, in 1995, the six co-workers were convicted of his death. The defendants’ lawyers at the time tried to claim someone else had committed the crime, but more recent appeals by Kutska have focused on the theory that Monfils could have killed himself.

Unlike “Making a Murderer,” the hit 2015 Netflix docu-series about the conviction of Steven Avery and Brendan Dassey in the 2005 murder of Teresa Halbach in Manitowoc County, “Beyond Human Nature” doesn’t argue the details of a case. Rather than advocating for a side, it focuses on the subject of homicide investigation through conflicting testimony.

“We are just not in the best position to authoritatively and responsibly rule on this is what happened. We’re just not in that position, so what do we have to contribute?" Neelsen said in a 2016 video about the film. "We are able to show the human beings for who they are and express and explore why, why such a mess that lasts for 22, 23 odd years is still in the consciousness of the people in the community and especially the people who lived it."

Work on the project began five years ago with filming in Green Bay and interviews with Mike Piaskowski, one of the six convicted, who was freed and exhonerated in 2001 after serving six years in prison, former District Attorney John Zakowski and Tom Monfils’ brother, Cal Monfils.

“Beyond Human Nature” is the second documentary from Neelsen. His 2012 film, “Last Day at Lambeau,” looked at the relationship between former Green Bay Packers quarterback Brett Favre and fans after deciding to play for the Minnesota Vikings.

“Beyond Human Nature” is being produced by Neelsen’s father, Dave Neelsen, through their production company StoryFirst Media. All of the primary filmmakers live in or are from Wisconsin.